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Paracoccus marcusii sp. nov., an orange Gram-negative coccus

¹Department of Genetics, The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
²Division of Microbial and Molecular Ecology and the Moshe Shilo Minerva Center for Marine Biogeochemistry, The Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

Author for correspondence: Joseph Hirschberg. Tel: +972 2 6585662. Fax: +972 2 5633066. e-mail: hirschu{at}vms.huji.ac.il

ABSTRACT

Phenotypic, chemotaxonomic and 16S rDNA sequence analysis of an orange Gram-negative coccus that appeared as a contaminant on a nutrient agar plate delineated a new species of the genus Paracoccus. Phenotypic features of the strain that differ from all or most of the previously described Paracoccus species include its bright orange colour, caused by the synthesis of large amounts of carotenoids (mainly astaxanthin), and its inability to use nitrate as an electron acceptor in respiration. The name Paracoccus marcusii is proposed for this organism. The type strain is DSM 11574^T.

Key Words: Paracoccus marcusii sp. nov. • phenotypic analysis • chemotaxonomic analysis • 16S rDNA analysis carotenoids (astaxanthin)

The EMBL accession number for the 16s rDNA sequence reported in this paper is Y12703.

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